Introduction

What can you expect from the Red Hat Enterprise Linux 7 Atomic Host Beta?

Specifically Designed to Run Containers

Red Hat Enterprise Linux 7 Atomic Host Beta provides a streamlined host platform that is optimized to run application containers. The software components included in Red Hat Enterprise Linux 7 Atomic Host Beta, as well as the default system tunings, have been designed to enhance the performance, scalability and security of containers, giving you the optimal platform on which to deploy and run application containers.

Atomic Updating and Rollback

Red Hat Enterprise Linux 7 Atomic Host Beta features a new update mechanism that operates in an image-like fashion. Based on rpm-ostree, updates are composed into “atomic” trees, which can be downloaded and deployed in a single step. The previous version of the operating system is retained, enabling you to easily rollback to an earlier state. This simplified upgrade and rollback capability reduces the time you spend “keeping the lights on.”

Container Orchestration

Through our collaborationwithGoogle, Red Hat Enterprise Linux 7 Atomic Host Beta includes Kubernetes, a framework for managing clusters of containers. Kubernetes helps with horizontal scaling of multi-container deployments across a container host, and interconnecting multiple layers of the application stacks. This enables you to orchestrate services running in multiple containers into unified, large-scale business applications.

Secure Host by Default

Security is paramount when it comes to running applications. Containers alone do not contain, but you can more effectively isolate vulnerable containers with a secure host like Red Hat Enterprise Linux 7 Atomic Host Beta that implements a secure environment by default. First, applications are only run within containers, not directly on the host, creating a clear security boundary. Each container is then confined using a combination of SELinux in enforcing mode, control groups, and kernel namespaces. These technologies prevent a compromised container from affecting other containers or the host and are the same proven technologies that have been delivering military-grade security to Red Hat customers for more than 10 years.

Red Hat Enterprise Linux Container Images and Building Containers

Red Hat Enterprise Linux 7 Atomic Host Beta provides all of the required tools to build and run container images based on Red Hat Enterprise Linux, including Red Hat Enterprise Linux 6 and 7 container images as well as the docker services. This means that applications that run on Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7 can be deployed in a container on Red Hat Enterprise Linux 7 Atomic Host Beta, opening access to a vast ecosystem of certified applications. Additionally, Red Hat Enterprise Linux 7 Atomic Host Beta users will have access to the full breadth of their Red Hat subscriptions inside these containers, including the the popular programming language stacks and development tools delivered through Red Hat Software Collections..

Attach init.iso to Atomic virtual machine via virt-manager and start it. Note, if you enconter “hda-duplex not supported in this QEMU binary” problem, change the sound device model from default to ac97 and try again util you can login it by centos/centos.